<template>
  <div class="cartcontrol">
    <transition>
      <div class="cart-decrease" v-show="food.count>0" @click.stop="decreaseCart">
        <span class="inner icon-remove_circle_outline"></span>
      </div>
    </transition>
    <div class="cart-count" v-show="food.count>0">{{food.count}}</div>
    <div class="cart-add icon-add_circle" @click.stop="addCart"></div>
  </div>
</template>

<script>
  import Vue from 'vue';

  export default {
    name: "",
    props: {
      food: Object
    },
    methods: {
      addCart() {
        if (!this.food.count) {
          //当我们给数据自定义添加属性时要用Vue的set方法
          //否则Vue是无法检测数据的变动
          Vue.set(this.food, 'count', 1);
          this.food.count = 1;
        } else {
          this.food.count++;
        }
        this.$emit('drop', event.target);
      },
      decreaseCart() {
        if (this.food.count) {
          this.food.count--;
        }
      }
    }
  }
</script>

<style type="text/less" lang="less" scoped>
  .cartcontrol {
    font-size: 0;

    .cart-decrease {
      display: inline-block;
      padding: 6px;

      &.v-enter,
      &.v-leave-to {
        opacity: 0;
        transform: translate3d(24px, 0, 0);

        .inner {
          transform: rotate(180deg);
        }
      }

      &.v-enter-active,
      &.v-leave-active {
        transition: all 0.4s linear;
      }

      .inner {
        display: inline-block;
        font-size: 24px;
        line-height: 24px;
        color: rgb(0, 160, 220);
        transition: all 0.4s linear;
        transform: rotate(0);
      }
    }

    .cart-count {
      display: inline-block;
      vertical-align: top;
      width: 12px;
      padding-top: 6px;
      line-height: 24px;
      text-align: center;
      font-size: 10px;
      color: rgb(147, 153, 159);
    }

    .cart-add {
      display: inline-block;
      padding: 6px;
      font-size: 24px;
      line-height: 24px;
      color: rgb(0, 160, 220);
    }
  }
</style>
